I liked the idea to add LEDs to de Petsfang Bullseye by using the insert at the front.
The little PCB with 3 LEDs I salvaged from an old flashlight didn't fit in other designs, so I thinkert up this design.

Creality

Ender 3

No

No

0.12

25%

Used 5 walls and 5 top and bottom layers, the same I did for the Bullseye itself.

I used hot glue to mount the LED print to this thing. I ran the wires through the wire-sleeve to the electronics case and splitted there. Via a 270 Ohm resistor I connected the LEDs to my Raspberry Pi running OctoPrint on the 5V and GND pins. The LEDs take about 200mA all together from the 3A available from a 24V-USB Buck Converter connected to the main powersupply.

I had to use a little hot glue to hold this thing firmly into the Bullseye!